JPH0557126B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an automobile suspension device.

(Prior art) Some automobile suspension systems have a suspension arm for the front wheels and a suspension arm for the rear wheels, which are attached to the vehicle body so as to be able to swing up and down, and are connected by a stabilizer to prevent pitting or nose dive. There is a method designed to suppress this (see Japanese Utility Model Application Publication No. 109006/1983).

In recent years, torsion bars are increasingly being used as springs for suspension arms due to reasons such as securing space around the suspension arms, but since these torsion bars are considered to be quite long, Generally, a torsion bar provided on one side of the front and rear suspension arms is arranged so as to necessarily extend toward the other suspension arm.

In this way, when trying to install a stabilizer that connects the front and rear suspension arms as described above to a suspension device that has a torsion bar, simply arranging the torsion bar and stabilizer in parallel will not be enough. The installation space would become extremely large, and some kind of countermeasure would be required.

(Object of the invention) The present invention takes the above-mentioned circumstances into consideration, and
To provide a suspension device for an automobile in which the installation space for a stabilizer connecting front and rear suspension arms and a torsion bar provided for at least one of the front and rear suspension arms can be reduced. The purpose is to

(Structure of the Invention) In order to achieve the above-mentioned object, in the present invention, the torsion bar provided for at least one of the front and rear suspension arms is configured to have a hollow shape, that is, a pipe shape. A stabilizer that connects the front and rear suspension arms is inserted into the hollow torsion bar. Of course, one end of the torsion bar is supported by the vehicle body, and the other end is connected to one of the suspension arms and extends toward the other suspension arm.

(Example) Examples of the present invention will be described below based on the attached drawings.

In Fig. 1, A is a suspension mechanism for the front wheels, and A' is a suspension mechanism for the rear wheels. First, the suspension mechanism A for the front wheels will be explained.
Reference numeral 1 denotes a front wheel suspension arm, which corresponds to a lower arm portion of a double wishbone type suspension in the embodiment. The front wheel 2 is supported at the outer end of the suspension arm 1, and the inner end of the suspension arm 1 is bifurcated. With the sleeve 3 integrated into the vehicle body narrowed, the bolt-like spindle 4 and nut 5 inserted into the sleeve 3 are used to
A suspension arm 1 is assembled to a sleeve 3. Thereby, the suspension arm 1, that is, the front wheel 2, is able to swing vertically relative to the vehicle body around the sleeve 3 (spindle 4).

As shown in FIG. 2, a front wheel torque arm 6 is integrated with the rear surface of the front wheel suspension arm 1 by welding or using fixing devices such as bolts and nuts. A mounting hole 7 concentric with the spindle 4 is formed in this torque arm 6, and a front wheel portion 8 of a front wheel torsion bar 8 is inserted into this mounting hole 7.
a are fitted together so that they cannot rotate relative to each other by means of serrations, splines, etc. (this fitting part is
(denoted by figure B). This torsion bar 8 extends toward the rear of the vehicle body, and its rear end portion 8b is connected to a support member 9.
It is supported by the vehicle body through. That is, the support member 9 extends in the radial direction of the torsion bar 8,
The cylindrical part 9a has a mounting hole 10 at one end thereof, and the rear end 8b of the torsion bar 8 is fitted into this mounting hole 10 by means of serrations, splines, etc., so that it cannot rotate relative to the cylindrical part 9a. Of course, the other end of the support member 9 is supported with respect to the vehicle body in a swing-adjustable manner centering on the cylindrical portion 9a side.
By adjusting the swing position, an initial torsion force is applied to the torsion bar 8. Note that reference numerals 11 and 12 in FIG. 2 are retaining rings for positioning the torsion bar 8 in the axial direction.

On the other hand, the rear wheel suspension mechanism A' that supports the rear wheel 2' is also substantially the same as the front wheel suspension mechanism A.
The torque arm 6' of the rear wheel suspension mechanism A' is the same as the rear wheel suspension arm 6'. A torsion bar 8' for the rear wheel extends forward, and both torsion bars 8 and 8' are arranged concentrically with each other. and,
Both torsion bars 8, 8' are hollow and made of pipe material.

13 in FIGS. 1 and 2 is a stabilizer that connects the front and rear suspension arms 1 and 1'.
This is inserted into both torsion bars 8, 8', and is fitted to the torsion bar 8 within the front wheel torque arm 6 by means of serrations, splines, etc. so that it cannot rotate relative to the torsion bar 8 (this fitting portion is shown in Figure 2). Similarly to the front end, the rear end (indicated by reference numeral D) is also fitted in the torque arm 6' for the rear wheel so that it cannot rotate relative to the torsion bar 8'. In this way, the stabilizer 13 is coupled to the front and rear torsion bars 8, 8' at its front and rear ends 13a, 13b in a relatively non-rotatable manner, while its intermediate portion is loosely fitted to the torsion bars 8, 8'. It is said that

In the above-described configuration, if the front wheel suspension arm 1 is to be displaced upward relative to the vehicle body due to sudden braking, for example, the force of this relative displacement will be applied via the stabilizer 13 to ( (The stabilizer 13 receives torsional force) is transmitted to the rear wheel suspension arm 1', causing the rear wheel suspension arm 1' to be relatively displaced upward with respect to the vehicle body, that is, in the same direction as the front wheel suspension arm 1. try This prevents the nose dive of the vehicle body. In this way, the front and rear suspension arms 1 and 1' tend to be displaced in the same direction via the stabilizer 13, so that the vehicle body is not affected by nose dives, pitching, or sudden starts in rear-wheel drive vehicles. This will prevent a large sinking of the rear part.

Although the embodiments have been described above, the present invention is not limited thereto, and includes, for example, the following cases.

The torsion bar is provided only on one of the front and rear suspension arms 1, 1', for example, while the torsion bar is provided only on the front suspension arm 1, and a coil spring is used on the rear suspension arm 1'. It may be a case.

The stabilizer 13 may simply be rotatably inserted through the entire length of the torsion bar 8 or 8' without being coupled to the torsion bar 8 or 8' in a manner that prevents relative rotation. In this case, the stabilizer 13 pulled out from the open end of the torsion bar
is bent in the longitudinal direction of the suspension arm 1 or 1' (vertical direction in FIG. 1), and this bent drawer part is connected to the suspension arm 1 or 1'. Good too. However, if the embodiment is adopted, the stabilizer 13 can be made as short as possible, and the space around the suspension arm can be increased.

(Effects of the Invention) As is clear from the above, the present invention has the following advantages:
The stabilizer is inserted into the hollow torsion bar so that the torsion bar and the stabilizer have a dual structure inside and out, which saves space compared to simply arranging the two in parallel. As a result, the degree of freedom in arranging various parts installed under the vehicle body, such as the exhaust pipe and the exhaust gas purification device, can be increased.

[Brief explanation of the drawing]

FIG. 1 is an overall mechanical diagram showing one embodiment of the present invention.
FIG. 2 is an enlarged sectional view of the main part of FIG. 1. A: Front wheel suspension mechanism, A': Rear wheel suspension mechanism, 1: Front wheel suspension arm, 1': Rear wheel suspension arm,
2: front wheel, 2': rear wheel, 8: torsion bar for front wheel, 8': torsion bar for rear wheel, 9, 9': support member, 13: stabilizer.

Claims (1)

[Scope of Claims] 1. A front wheel suspension arm and a rear wheel suspension arm that are respectively attached to the vehicle body so as to be able to swing up and down, and at least one of the front and rear suspension arms. It is set up against
a torsion bar whose one end is supported by the vehicle body and whose other end is connected to the one suspension arm; and a stabilizer which connects the front and rear suspension arms to each other; A suspension device for an automobile, characterized in that one of the suspension arms extends toward the other suspension arm and is hollow, and the stabilizer is inserted into the hollow torsion bar. .